Research on the Microstructures and Mechanical Properties of Annealed Cold Upsetting AZ31 Magnesium Alloy

Tian Mo Liu; Wei Hui Hu; Qing Liu

doi:10.4028/www.scientific.net/MSF.610-613.826

Paper Titles

Preparation of Semi-Solid Billet of ZW61 Alloy by Equal Channel Angular Extrusion
p.806

Microstructure and Mechanical Properties of an Mg-Zn-Zr Alloy Modified by Rare Earth of Erbium
p.810

Deformation Behavior and Dynamic Recrystallization of As-Cast Mg-Y-Nd-Gd-Zr Alloy: A Study with Processing Map
p.815

Mechanical Properties and Microstructure of AM140 Magnesium Alloy
p.822

Research on the Microstructures and Mechanical Properties of Annealed Cold Upsetting AZ31 Magnesium Alloy
p.826

Damage Evolution Equation of AZ31B Magnesium Alloy during Superplastic Deformation
p.831

Upper-Bound Analysis for Change-Channel Angular Extrusion
p.838

Research on the Rolling of AZ31 Strip Prepared by Twin Roll Casting
p.844

First-Principles Study of the Mechanical Properties of Mg-Based Alloys with FCC and Hexagonal Structure
p.848

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Research on the Microstructures and Mechanical Properties of Annealed Cold Upsetting AZ31 Magnesium Alloy

Abstract:

The microstructures and mechanical properties of cold upsetting magnesium alloys were investigated upon anneal under different conditions. The results show that a large amount of twins were observed in the original grains of cold upsetting AZ31 magnesium alloys. The twins disappeared gradually and recrystal grains formed after anneal. The volume fraction of the recrystal grains increases as the strain of samples rises. Recrystal grain size grows large with the elevated annealing temperature. Recrystal grain size reduces at first and then grows as the annealing time is prolonged. In addition, compared with as-cast magnesium alloys, the yield strength of cold upsetting samples increase apparently due to grain refinement after anneals.